The seeds of that worry, that fear of not having enough, were planted on the Oklahoma plains. Money, to Warren, has always been about much more than dollar bills. It’s been shorthand for security, acceptance, and family stability. On the campaign trail, she has described her childhood as teetering on “the ragged edge of the middle class.’’ Those descriptions fit, at some points in her upbringing more than others. But behind these catch-phrases lies a more layered story.